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Roborovski hamsters are the smallest hamster and generally live the longest. Roborovski hamsters typically live 3 to 3 1/2 years or longer. The golden hamster is the most common type of hamster sold in stores and has an average lifespan of 2 to 3 years. Syrian hamsters and Campbell's Russian hamsters typically live around 1 to 2 years. Hamsters tend to live the longest with proper housing, a nutritious diet and plenty of exercise.